309499101 has 12 divisors (see below), whose sum is σ = 447207228. Its totient is φ = 206262144.

The previous prime is 309499097. The next prime is 309499103. The reversal of 309499101 is 101994903.

It can be written as a sum of positive squares in 2 ways, for example, as 103002201 + 206496900 = 10149^2 + 14370^2 .

It is not a de Polignac number, because 309499101 - 2² = 309499097 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309499103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45541 + ... + 51893.

It is an arithmetic number, because the mean of its divisors is an integer number (37267269).

Almost surely, 2^309499101 is an apocalyptic number.

It is an amenable number.

309499101 is a deficient number, since it is larger than the sum of its proper divisors (137708127).

309499101 is a wasteful number, since it uses less digits than its factorization.

309499101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11772 (or 11769 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 309499101 is about 17592.5865352426. The cubic root of 309499101 is about 676.4252289113.

The spelling of 309499101 in words is "three hundred nine million, four hundred ninety-nine thousand, one hundred one".